Baldwin is the first player to win the award in back-to-back seasons in 21 years.
Klosowicz had six extra-base hits in four games this weekend.
The Nittany Lions took down then-No. 3 Cornell to move up four spots.
Wiebusch went through the legs to upset Michigan Friday night.
Colby Baldwin and Hunter Aquino took home the conference's awards.
The Nittany Lions will have home matches against three teams that were ranked at the end of last season.